Mercurial > hg > octave-image

comparison isgray.m @ 0:587e29845b1d Octave-Forge-2001.11.02

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial revision
author pkienzle
date Wed, 10 Oct 2001 19:54:49 +0000
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:587e29845b1d
1 ## Copyright (C) 2000 Kai Habel
2 ##
3 ## This program is free software; you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation; either version 2 of the License, or
6 ## (at your option) any later version.
7 ##
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
12 ##
13 ## You should have received a copy of the GNU General Public License
14 ## along with this program; if not, write to the Free Software
15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17 ## -*- texinfo -*-
18 ## @deftypefn {Function File} @var{bool}= isgray (@var{I})
19 ## returns true for an intensity image. All intensity values must
20 ## be in the range [0,1].
21 ## @end deftypefn
22
23 ## Author: Kai Habel <kai.habel@gmx.de>
24 ## Date: 20/03/2000
25
26 function bool = isgray (I)
27
28 bool = 0;
29
30 if !(nargin == 1)
31 usage ("isgray(I)");
32 endif
33
34 if (!is_matrix(I))
35 return;
36 endif
37
38 bool = all (all ((I >= 0) && (I <= 1)));
39
40 endfunction